Authorities have arrested a 24-year-old Quincy woman who they allege disguised herself as a 17-year-old male in striking up an interstate Internet romance with a West Virginia minor.

Carissa Hads, who according to court documents lives on Whitwell Street in Quincy, was arrested May 24 in Pittsburgh, where she was planning to meet with the 15-year-old West Virginia girl, police allege.

Hads is charged with sexual penetration of a minor child by crossing state lines. A federal judge ordered her to be detained in West Virginia on June 8.

A police affidavit alleges Hads used the name “Puryear Wilson” in interacting with the West Virginia girl online, where they met in October 2010. Hads told the girl she was 17 years old and the father of twin sons, the affidavit says.

Hads sent the girl cell phones to use when they talked and paid the bills for the phones. Authorities allege the girl used the phones to send Hads nude pictures of herself.

The two communicated for 14 months until, in December 2011, authorities allege Hads met up with the 15-year-old girl in Pennsylvania for the first time.

The girl’s mother, the affidavit states, drove her daughter to a Pennsylvania motel to meet Hads and paid for a room for herself and her daughter there. The mother also paid for a separate room for Hads, according to the affidavit.

The girl stated that during the evening, Hads “digitally penetrated” her, according to the affidavit.

The two met up again in February at the girl’s home in West Virginia. The girl told her mother, according to the affidavit, that she had sexual intercourse with Hads during the visit, but that Hads did not undresses during the interaction. The girl and her mother told police Hads wore a back brace which covered the chest and blue-colored contact lenses.

The girl eventually confronted Hads over her true identity, and Hads allegedly threatened her life in response, according to the affidavit.

The affidavit says Hads requested the girl’s mother send her packages via mail that contained several items Hads had bought for the girl. She gave the Whitwell Street address in Quincy as a shipping address. The packages were intercepted by postal inspectors on March 29.